Block unknown

[willboyce]

How can I block unknown calls on iPhone 7 ???
I can't select it to block like numbers that I've blocked

 

[nikkimd11]

How can I block unknown calls on iPhone 7 ???
I can't select it to block like numbers that I've blocked

Hi I don't think there is a way to block a number if the number doesn't actually appear when the cal comes in. Here is an article that states other options you have to avoid those calls from coming in but it I'm sure it isn't the solution your are looking for.
http://www.thecellguide.com/iphone6blockunknown.php